Abstract
Abstract Acacia crassicarpa is a fast-growing plant on peatlands that is capable of binding atmospheric CO2 and storing it in carbon. The study aims to calculate carbon stocks in Acacia crassicarpa plantations and their potential to absorb atmospheric CO2. The research was performed in an industrial plantation forest in Siak Regency, Riau Province. The observation plots employed stratified random sampling by measuring the height and diameter of Acacia crassicarpa aged 12, 24, 36 and 42 months, as well as the biomass of undergrowth and litter. Stored carbon was estimated by calculating tree biomass through the approach of specific gravity and trees volume, while for understory plants and litter was based on their dry weight. The results exhibited that Acacia crassicarpa aged 12, 24, 36 and 42 months had carbon stocks of 4.14 tons/ha, 18.55 tons/ha, 43.82 tons/ha and 69.39 tons/ha. The ability of the stand to absorb CO2 in the atmosphere is 15.23 tons/ha, 68.08 tons/ha, 160.81 tons/ha, and 254.67 tons/ha. The potential carbon stored in the understory stands at 0.64 tons/ha, 0.79 tons/ha, 0.85 tons/ha, and 0.86 tons/ha. The carbon stored in litter is 0.80 tons/ha, 1.27 tons/ha, 1.49 tons/ha, and 1.5 tons/ha.
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